As nice as the Cruz Android tablets are, it's just a little bit too early to buy one. Google hasn't yet authorized any shipping tablets to have access to the Android Market. That is expected with OS 3.0 (tablets are currently 1.6, 2.1 or 2.2). Until then, any software / apps you might want cannot be sourced from the App Market. Further, any existing tablet, that does not have a written guarantee from the vendor of being capable of upgrade to 3.0 should be considered an interim, temporary purchase.
So -- provided you are happy with what the tablet does TODAY (and you might be!), go ahead and buy one. Otherwise, proceed with caution and eyes wide open.